Pet bed



FIG. 1 is a top view of a pet bed showing my new design;

FIG. 2 is a front view;

FIG. 3 is a back view;

FIG. 4 is a side view;

FIG. 5 is a bottom view;

FIG. 6 is an open view;

FIG. 7 is a perspective view; and,

FIG. 8 is another perspective view. 

The ornamental design for a pet bed, as shown. 